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Fused Silica UHV Viewports With Broadband Anti-Reflective Coatings

VacTechniche Vacuum Optics – Viewports

Fused Silica UHV Viewports With Broadband Anti-Reflective Coatings

VacTechniche fused silica viewports are offered with a four-layer broadband anti-reflective (BBAR) coating on both sides of the window optimised to a customer specified laser wavelength range. In many cases, the coating reduces reflection to below 0.5% per face or 1% total at the key wavelengths specified.

Please advise the important wavelengths or wavelength range with your enquiry or order. Wavelength ranges between 240 nm and 1550 nm can be accepted as standard, although coatings for other wavelength ranges can be quoted on request. Viewports with ‘V’ coatings for a single wavelength for laser applications are also offered. The viewports comprise a high purity laser quality fused silica optic with precise flatness, parallelism, scratch and dig specifications.

The non-magnetic viewports use a non-magnetic weld ring instead of the regular kovar weld ring. TSL viewports are manufactured in cleanroom conditions and helium leak tested, cleaned and packed to UHV standards. The rugged construction of the fused silica viewports allows repeated bake-out with UHV performance, whilst the window offers broadband optical transmission through deep UV, visible to near infra-red.

Non-standard viewports can be manufactured on request, including re-entrant style microscope/camera viewports. Annealed copper gaskets and other component accessories are also supplied by VacTechniche.